package com.ict.ycwl.user.service.impl;

import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.ict.ycwl.user.service.CaptchaService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;

@Service
@Slf4j
public class CaptchaServiceImpl implements CaptchaService {

    @Autowired
    private DefaultKaptcha defaultKaptcha;

    @Override
    public Object captcha(HttpServletRequest request, HttpServletResponse response) {

        // 定义response输出类型为image/jpeg类型
        response.setDateHeader("Expires", 0);

        // Set standard HTTP/1.1 no-cache headers.
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");

        // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");

        // Set standard HTTP/1.0 no-cache header.
        response.setHeader("Pragma", "no-cache");

        // return a jpeg
        response.setContentType("image/jpeg");

        //获取验证码文本内容
        String text = defaultKaptcha.createText();
        log.info("验证码内容：{}", text);
        response.addHeader("captcha",text);
        response.setHeader("Access-Control-Expose-Headers","captcha");

        //将验证码文本内容放入session
        request.getSession().setAttribute("captcha", text);
        log.info(String.valueOf(request.getSession()));

        //根据文本验证码内容创建图形验证码
        BufferedImage image = defaultKaptcha.createImage(text);
        ServletOutputStream outputStream = null;
        try {
            outputStream = response.getOutputStream();
            //输出流输出图片，格式为jpg
            ImageIO.write(image, "jpg", outputStream);
            outputStream.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (null != outputStream) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }

//    @Override
//    public AjaxResult getCaptcha(HttpServletRequest request) {
//
//        //获取验证码
//        if (request.getSession() != null) {
//            log.info(String.valueOf(request.getSession()));
//            String verifyCode = (String) request.getSession().getAttribute("captcha");
//            log.info(verifyCode);
//            return AjaxResult.success(verifyCode);
//        } else {
//            return AjaxResult.error("session失效");
//        }
//    }

}
